update

assets/shaders/phong-solid.fragment.glsl

@@ -2,29 +2,28 @@
 out vec4 frag_color;
 
 uniform vec3 light_pos;
-uniform vec3 solid_color;
+uniform vec4 solid_color;
 uniform vec3 camera;
 
 in vec3 normal;
 in vec3 frag_position;
  
 void main() {
-    vec3 light_color = vec3(1, 1, 1);
+    vec4 light_color = vec4(1, 1, 1, 1);
     vec3 normal_norm = normalize(normal);
     vec3 light_direction_norm = normalize(light_pos - frag_position);
 
     float ambient_strength = 0.15;
-    vec3 ambient = ambient_strength * light_color;
+    vec4 ambient = ambient_strength * light_color;
 
     float diffuse_strength = max(dot(normal_norm, light_direction_norm), 0.0);
-    vec3 diffuse = diffuse_strength * light_color;
+    vec4 diffuse = diffuse_strength * light_color;
 
     float specular_strength = 0.9;
     vec3 view_direction_norm = normalize(camera - frag_position);
     vec3 reflect_dir = reflect(-light_direction_norm, normal_norm);
     float spec = pow(max(dot(view_direction_norm, reflect_dir), 0.0), 32);
-    vec3 specular = specular_strength * spec * light_color;
+    vec4 specular = specular_strength * spec * light_color;
 
-    vec3 phong = specular + (ambient + diffuse) * solid_color;
-    frag_color = vec4(phong, 1.0);
+    frag_color = specular + (ambient + diffuse) * solid_color;
 }